Hierarchy/Derived subclasses
| 131 / 329 | -> 257 | -> 258 |
| -> 259 | ||
| -> 260 |
uspto searches
Patent Apps in 131/257Granted Patents in 131/257
Use the links above or do an advanced search in ppubs for:
(131/257.ccls. or 131/258.ccls. or 131/259.ccls. or 131/260.ccls.)
This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find patents or patent applications in those subclasses.